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Ch 14
Test Description: Ch 14 heat
Instructions: Answer all questions to get your test result.
1) In al cooling systems energy is transfered as heat from one substance to another, leaving the first substance with less energy and with a lower temperature
A
false
B
true
2) Heating minimizes undesirable energy transfers
A
false
B
true
3) According to the first law of thermodynamics
A
the total energy used in any process is conserved
B
in any process thee is a decrease in potential energy
C
there is no such thing as a perpetual motion machine
D
the energy of a system is constant
4) The Farenheit temperature scale is defined by which of the following temperatures
A
water boils at 212 degrees and freezes at 32 degrees
B
liquid water turns to gas at 100 degrees and to a solid at 0 degrees
C
water boils at 100 degrees and freezes at 32 degrees
D
water evaporates at 212 degrees and freezes at 0 defrees
5) temperature is a mesaure of average _______ energy of an object\'s particles
A
light
B
mechanical
C
potential
D
kinetic
6) The temperature at which all molecular motion stops is
A
all of the answers are correct
B
0 degrees C
C
0 degrees F
D
0 degrees K
7) The energy transferred between objects with a different temperature is
A
heat
B
cold
C
absolute zero
D
potential
8) _____ describes how much energy is required to raise an object\'s temperature
A
specific heat
B
radiation
C
conduction
D
convection
9) _____ does not involve the movement of matter
A
none of the answers are correct
B
radiation
C
conduction
D
heat
10) when energy is transformed, the amount of usable energy
A
remains constant
B
decreases
C
none of the answers are correct
D
increases
*select an answer for all questions
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